CVE-2010-2023

Name	CVE-2010-2023
Description	transports/appendfile.c in Exim before 4.72, when a world-writable sticky-bit mail directory is used, does not verify the st_nlink field of mailbox files, which allows local users to cause a denial of service or possibly gain privileges by creating a hard link to another user's file.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
exim4 (PTS)	jessie, jessie (lts)	4.84.2-2+deb8u12	fixed
	stretch (security)	4.89-2+deb9u8	fixed
	stretch (lts), stretch	4.89-2+deb9u13	fixed
	buster, buster (lts)	4.92-8+deb10u10	fixed
	buster (security)	4.92-8+deb10u9	fixed
	bullseye	4.94.2-7+deb11u3	fixed
	bullseye (security)	4.94.2-7+deb11u4	fixed
	bookworm	4.96-15+deb12u6	fixed
	bookworm (security)	4.96-15+deb12u5	fixed
	sid, trixie	4.98-2	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
exim4	source	(unstable)	4.72-1	low

[lenny] - exim4 <no-dsa> (Minor issue)